The order the City kept.

NYC-WTC_000063538

Record of sample extraction on September 25-26, 2001, with analysis completed in early October 2001.

NYC-WTC_000063539 – NYC-WTC_000063542

Technical record outlining methods for sample extraction and pH measurement during DEP laboratory testing.

NYC-WTC_000063543 – NYC-WTC_000063554

Header page for environmental sample analysis records from the World Trade Center site dated October 2001.

NYC-WTC_000063555 – NYC-WTC_000063561

Chemical analysis report for sample AD22754 showing DDT levels and quality control pass status from October 2001.

NYC-WTC_000063562 – NYC-WTC_000063574

Lab blank analysis data for sample AD22754 listing pesticide and contaminant detection limits from October 2001.

NYC-WTC_000063575 – NYC-WTC_000063582

Calibration standard analysis data for sample AD22754 listing chemical response values from October 2001.

NYC-WTC_000063583 – NYC-WTC_000063590

Reference standard analysis data for sample AD22754 listing chemical response values from October 2001.

NYC-WTC_000063591 – NYC-WTC_000063598

Method detection limit analysis data for sample AD22754 listing chemical response values from October 2001.

NYC-WTC_000063599 – NYC-WTC_000063603

Chemical analysis report for sample AD22775 listing pesticide and contaminant detection limits from October 2001.

NYC-WTC_000063604 – NYC-WTC_000063608

Chemical analysis report for sample AD22777 listing pesticide and contaminant detection limits from October 2001.

NYC-WTC_000063609 – NYC-WTC_000063613

Chemical analysis report for sample AD22778 listing pesticide and contaminant detection limits from October 2001.

NYC-WTC_000063614 – NYC-WTC_000063618

Chemical analysis report for sample AD22779 listing pesticide and contaminant detection limits from October 2001.

NYC-WTC_000063619 – NYC-WTC_000063622

Chemical analysis report for sample AD22779 listing pesticide and contaminant detection limits from October 2001.

NYC-WTC_000063623 – NYC-WTC_000063634

Log sheet recording laboratory sample preparation details including volume and pH measurements from October 2001.

NYC-WTC_000063635 – NYC-WTC_000063641

Laboratory report detailing analysis of lab blank sample AD22754 conducted between September 25 and October 1, 2001.

NYC-WTC_000063642 – NYC-WTC_000063654

Lab blank analysis data for sample AD22754 listing pesticide and contaminant detection limits from October 2001.

NYC-WTC_000063655 – NYC-WTC_000063662

Calibration standard analysis data for sample AD22754 listing chemical response values from October 2001.

NYC-WTC_000063663 – NYC-WTC_000063670

Method detection limit analysis data for sample AD22754 listing chemical response values from October 2001.

NYC-WTC_000063671 – NYC-WTC_000063675

Reference standard analysis data for sample AD22754 listing chemical response values from October 2001.

NYC-WTC_000063676 – NYC-WTC_000063680

Chemical analysis report for sample AD22754 listing pesticide and contaminant detection limits from October 2001.

NYC-WTC_000063681 – NYC-WTC_000063685

Chemical analysis report for sample AD22773 listing pesticide and contaminant detection limits from October 2001.